: Fossils show how older fossils are different than modern animals. Since they are often able to be precisely dated they prove that all organisms changed over time. It isn't like there is an actual scientific controversy about it. They clearly show organisms radiating into to new types of animals and they undeniably prove evolution beyond any rational doubt. DNA evidence is probably even better and it completely supports the basic assumptions though there have been a few surprises since the fossil record isn't entirely complete.